2005-06-01 Each Ascendant is legendary in both its unflipped and flipped forms. This means that effects that look for legendary creature cards, such as Time of Need and Captain Sisay, can find an Ascendant.
2005-06-01 If you have multiple opponents, Erayo's Essence can trigger once for each opponent.
2005-06-01 If Erayo, Soratami Ascendant flips while an opponent's first spell for the turn is still on the stack, the ability of Erayo's Essence doesn't trigger because the opponent's spell has already been cast. The spell isn't countered.
2005-06-01 Erayo's Essence triggers only for the first spell an opponent casts in a given turn. It doesn't trigger off any other spell that player casts after the first.
Card is legal to play in any sanctioned tournaments for that format.
If a card appears on the banned list for your chosen format, then you may not include that card in your deck or sideboard. Doing so makes your deck illegal to play in any sanctioned tournaments for that format.
If you wish to use a card that’s on the restricted list for your chosen format, you may include only a single copy of that card, counting both your main deck and your sideboard.
Currently, only the Vintage format uses a restricted list.